Add test for buffer and vec byte_size() function (#403)

Author: nawrinsu

SYCL/Basic/buffer/buffer.cpp

@@ -693,6 +693,13 @@ int main() {
     });
   }
 
+  {
+    int data = 5;
+    buffer<int, 1> Buffer(&data, range<1>(1));
+    assert(Buffer.size() == 1);
+    assert(Buffer.byte_size() == 1 * sizeof(int));
+  }
+
   // TODO tests with mutex property
   return failed;
 }

SYCL/Basic/vector_operators.cpp

@@ -30,6 +30,14 @@ void check_result_length_4(ResultVecT &res, ResultVecT &expected_res) {
                            expected_res.template swizzle<s::elem::s3>()));
 }
 
+template <typename T, int N> void check_vector_size() {
+  using vec_type = s::vec<T, N>;
+  vec_type Vec;
+  constexpr auto length = (N == 3 ? 4 : N);
+  assert(Vec.size() == N);
+  assert(Vec.byte_size() == sizeof(T) * length);
+}
+
 int main() {
 
   /* Separate checks for NumElements=1 edge case */
@@ -267,5 +275,13 @@ int main() {
     check_result_length_4<res_vec_type>(res, expected);
   }
 
+  // size() and byte_size() functions
+  {
+    check_vector_size<char, 1>();
+    check_vector_size<int, 2>();
+    check_vector_size<float, 3>();
+    check_vector_size<double, 4>();
+  }
+
   return 0;
 }